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Finding the Fourth Proportional to 1,101.76, 1,653.72 and 755.20

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Solution

The fourth proportional to 1,101.76, 1,653.72 and 755.20 is: 1,133.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.76 : 1,653.72 = 755.20 : x
  2. Step 2: Convert to fraction form
    1,101.76/1,653.72 = 755.20/x
  3. Step 3: Cross multiply
    1,101.76x = 1,653.72 × 755.20
  4. Step 4: Simplify right side
    1,101.76x = 1,248,889.34
  5. Step 5: Solve for x
    x = 1,248,889.34/1,101.76
  6. Step 6: Final answer
    x = 1,133.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.